[King Sun]

Originally Posted by archtaan

You probably made a mistake, but I hope not. There is a 179page thread on GM-trucks.com specific to vibration issues in these trucks.

Been everything from out of round rims, unbalanced tires, u joints, unbalanced driveshaft, improper pinion angle, right side engine mount needing 3mm of shims, trans not being properly aligned with motor. GM admits there is a problem but they dont have a solution.

Whats worse is the problem is often intermittent and hard to trace. GM will figure it out and take care of it for you.